package com.wz.jiangsu.main;

import java.util.HashMap;
import java.util.Hashtable;

/**
 * @program: wz
 * @author: wangzhou
 * @create: 2024-03-04 17:53
 * @description:
 **/
public class TestMap {
    public static void main(String[] args) {
        HashMap<Integer, String> map = new HashMap<>();

        Hashtable<Integer, String> hashTable = new Hashtable<>();

        hashTable.put(null,"wz");


        String wangzhou = map.put(1, "wangzhou");
    }
}
